ballrace
nounEtymology From ball + race.
1
Engineering, Mechanical, Mechanical engineering, Natural sciences, Physical sciences A ring with a groove in which rolling elements (such as balls) ride, forming part of a rolling-element bearing (for example, a ball bearing).
- Home-made scooters could be special affairs made in carpenters' shops, or they could be made by boys with two rough-hewn pieces of wood put together with ball-races for the wheels.1971, Gwen White, Antique Toys And Their Background, page 128: